Added test_opaque to serialize/all_tests.
Added test_opaque to serialize/all_tests.

crs4/pydoop,simleo/pydoop,elzaggo/pydoop,crs4/pydoop,elzaggo/pydoop,elzaggo/pydoop,crs4/pydoop,simleo/pydoop,simleo/pydoop,elzaggo/pydoop,crs4/pydoop,simleo/pydoop,crs4/pydoop,simleo/pydoop,elzaggo/pydoop